/* ============================================
   纱时光 - Modern Premium Design
   现代化高端官网样式
   ============================================ */

/* === CSS Variables === */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --accent: #06b6d4;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --gray-700: #334155;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.25);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  color: var(--gray-700);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* === Container === */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  color: var(--dark);
  font-weight: 700;
  line-height: 1.3;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

/* ============================================
   HEADER - 现代化玻璃态导航
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(150, 150, 150, 0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 10px 20px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: white;
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition);
}

.nav-link:hover {
  color: white;
  background: rgba(37, 99, 235, 0.3);
}

.nav-link.active {
  color: white;
  background: rgba(37, 99, 235, 0.3);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  font-size: 1.5rem;
  color: var(--dark);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--white);
  padding: 16px;
  box-shadow: var(--shadow-lg);
  z-index: 999;
}

.mobile-menu.active { display: block; }
.mobile-menu a {
  display: block;
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-700);
  border-radius: var(--radius-sm);
}
.mobile-menu a:hover { background: var(--gray-100); }

/* ============================================
   HERO - 全屏轮播
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

.carousel-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease, visibility 0.8s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-slide.active {
  opacity: 1;
  visibility: visible;
}

.carousel-slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.5) 0%, rgba(37, 99, 235, 0.3) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
  animation: fadeInUp 1s ease;
}

.hero-content h1 {
  color: var(--white);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  letter-spacing: -0.02em;
}

.hero-content p {
  color: rgba(255,255,255,0.9);
  font-size: clamp(1.125rem, 2vw, 1.35rem);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-content .btn {
  margin: 0 8px;
}

.carousel-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}

.dot:hover { background: rgba(255,255,255,0.7); }
.dot.active {
  background: var(--white);
  box-shadow: 0 0 12px rgba(255,255,255,0.5);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: var(--white);
}

.btn-outline-dark {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline-dark:hover {
  background: var(--primary);
  color: var(--white);
}

.btn-large { padding: 16px 40px; font-size: 1.0625rem; }
.btn-block { width: 100%; }

/* ============================================
   FEATURES - 特色服务
   ============================================ */
.features {
  padding: 100px 0;
  background: var(--gray-100);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

.section-header p {
  color: var(--gray-500);
  font-size: 1.125rem;
  margin-top: 24px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--white);
  padding: 40px 28px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  display: block;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--gray-500);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ============================================
   PRODUCTS GRID
   ============================================ */
.products-preview, .products-section {
  padding: 100px 0;
}

.products-grid {
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.product-image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-image img { transform: scale(1.08); }

.badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

.badge-hot {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
}

.badge-new {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.4);
}

.product-info {
  padding: 24px;
}

.product-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--gray-100);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 12px;
}

.product-name {
  font-size: 1.125rem;
  margin-bottom: 8px;
  color: var(--dark);
}

.product-desc {
  color: var(--gray-500);
  font-size: 0.875rem;
  margin-bottom: 12px;
}

.product-price {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.product-price .product-unit {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-500);
}

.section-footer {
  text-align: center;
  margin-top: 48px;
}

/* Category Filter */
.category-filter {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 12px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-500);
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: 50px;
  transition: var(--transition);
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

/* ============================================
   STATS
   ============================================ */
.stats {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--white);
  background: linear-gradient(135deg, var(--white) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
  font-weight: 500;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, var(--accent) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.cta h2 {
  color: var(--white);
  margin-bottom: 16px;
  position: relative;
}

.cta p {
  color: rgba(255,255,255,0.9);
  font-size: 1.25rem;
  margin-bottom: 36px;
  position: relative;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  position: relative;
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
  text-align: center;
}

.page-header h1 {
  color: var(--white);
  margin-bottom: 12px;
}

.page-header p {
  color: rgba(255,255,255,0.7);
  font-size: 1.125rem;
}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
  padding: 20px 0;
  background: var(--gray-100);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--gray-500);
}

.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--primary); font-weight: 500; }

/* ============================================
   PRODUCT DETAIL
   ============================================ */
.product-detail {
  padding: 60px 0 100px;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

/* Gallery */
.product-gallery {
  position: sticky;
  top: 100px;
}

.gallery-main {
  position: relative;
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 16px;
}

.gallery-main img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.gallery-main .badge {
  top: 20px;
  right: 20px;
}

.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.gallery-thumbs img {
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0.6;
  transition: var(--transition);
  border: 2px solid transparent;
}

.gallery-thumbs img:hover { opacity: 1; }
.gallery-thumbs img.active {
  opacity: 1;
  border-color: var(--primary);
}

/* Product Info */
.product-info-detail h1 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.product-category-tag {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 16px;
}

.product-summary {
  color: var(--gray-500);
  font-size: 1.0625rem;
  margin-bottom: 24px;
  line-height: 1.8;
}

.product-price-detail {
  background: var(--gray-100);
  padding: 24px;
  border-radius: var(--radius-md);
  margin-bottom: 28px;
}

.price-label {
  color: var(--gray-500);
  font-size: 0.875rem;
  margin-right: 8px;
}

.price-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
}

.price-unit {
  font-size: 1rem;
  color: var(--gray-500);
  font-weight: 500;
}

.product-specs {
  margin-bottom: 28px;
}

.spec-item {
  display: flex;
  padding: 14px 0;
  border-bottom: 1px solid var(--gray-200);
}

.spec-label {
  width: 80px;
  color: var(--gray-500);
  font-size: 0.875rem;
}

.spec-value {
  color: var(--dark);
  font-weight: 500;
}

.product-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
}

.product-features {
  display: flex;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-500);
  font-size: 0.875rem;
}

.feature-icon { font-size: 1.25rem; }

/* Tabs */
.product-tabs {
  border-top: 1px solid var(--gray-200);
  padding-top: 40px;
}

.tabs-header {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  border-bottom: 2px solid var(--gray-200);
}

.tab-btn {
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-500);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.tab-btn:hover { color: var(--primary); }
.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.tab-panel h3 {
  font-size: 1.25rem;
  margin: 24px 0 16px;
}

.tab-panel h3:first-child { margin-top: 0; }

.tab-panel ul {
  list-style: disc;
  padding-left: 24px;
}

.tab-panel li {
  margin-bottom: 12px;
  line-height: 1.8;
  color: var(--gray-700);
}

.tab-panel p { line-height: 1.8; margin-bottom: 16px; }

/* Specs Table */
.specs-table {
  width: 100%;
  border-collapse: collapse;
}

.specs-table tr:nth-child(odd) { background: var(--gray-100); }
.specs-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
}
.specs-table td:first-child {
  width: 180px;
  color: var(--gray-500);
  font-weight: 500;
}

/* FAQ */
.faq-item {
  padding: 24px;
  background: var(--gray-100);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.faq-item h4 {
  color: var(--dark);
  margin-bottom: 8px;
  font-size: 1rem;
}

.faq-item p { color: var(--gray-500); margin: 0; }

/* Related Products */
.related-products {
  padding: 80px 0;
  background: var(--gray-100);
}

.related-products h2 {
  text-align: center;
  margin-bottom: 40px;
}

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-intro {
  padding: 100px 0;
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-intro-content h2 {
  margin-bottom: 24px;
}

.about-intro-content p {
  margin-bottom: 20px;
  line-height: 1.9;
}

.about-intro-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
}

.about-intro-image img {
  width: 100%;
  aspect-ratio: 5/4;
  object-fit: cover;
}

/* Timeline */
.about-timeline {
  padding: 100px 0;
  background: var(--gray-100);
}

.about-timeline h2 { text-align: center; margin-bottom: 60px; }

.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  margin-bottom: 48px;
  position: relative;
}

.timeline-item:nth-child(odd) { flex-direction: row-reverse; }

.timeline-year {
  width: 50%;
  padding-right: 40px;
  text-align: right;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.timeline-item:nth-child(odd) .timeline-year {
  padding-right: 0;
  padding-left: 40px;
  text-align: left;
}

.timeline-content {
  width: 50%;
  padding-left: 40px;
}

.timeline-item:nth-child(odd) .timeline-content {
  padding-left: 0;
  padding-right: 40px;
}

.timeline-content h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.timeline-content p { color: var(--gray-500); }

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 8px;
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

/* Values */
.about-values {
  padding: 100px 0;
}

.about-values h2 { text-align: center; margin-bottom: 60px; }

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.value-card {
  background: var(--white);
  padding: 40px 28px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
}

.value-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.value-card h3 { margin-bottom: 12px; }
.value-card p { color: var(--gray-500); font-size: 0.9375rem; }

/* Certs */
.about-certs {
  padding: 100px 0;
  background: var(--gray-100);
}

.about-certs h2 { text-align: center; margin-bottom: 60px; }

.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.cert-item {
  background: var(--white);
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.cert-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.cert-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.cert-item h4 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.cert-item p { color: var(--gray-500); font-size: 0.875rem; }

/* Team */
.about-team { padding: 100px 0; }
.about-team h2 { text-align: center; margin-bottom: 60px; }

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.team-member {
  background: var(--white);
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.team-member:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
}

.team-avatar {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto 20px;
}

.team-member h4 { font-size: 1.125rem; margin-bottom: 4px; }
.team-member p { color: var(--gray-500); margin-bottom: 8px; }
.team-member span {
  display: inline-block;
  padding: 4px 12px;
  background: var(--gray-100);
  color: var(--gray-500);
  font-size: 0.75rem;
  border-radius: 20px;
}

/* ============================================
   CONTACT PAGE
   ============================================ */
.contact-section { padding: 80px 0; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-info h2 { margin-bottom: 32px; }

.contact-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 40px;
}

.contact-card {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--gray-100);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.contact-card:hover {
  background: var(--white);
  box-shadow: var(--shadow-lg);
}

.contact-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-content h4 {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: 4px;
  font-weight: 500;
}

.contact-main {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}

.contact-content p:last-child {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.contact-wechat {
  padding: 28px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
  border-radius: var(--radius-lg);
  text-align: center;
}

.contact-wechat h4 {
  margin-bottom: 20px;
  font-size: 1.125rem;
}

.wechat-qr .qr-placeholder {
  width: 120px;
  height: 120px;
  background: var(--white);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  margin: 0 auto 12px;
  box-shadow: var(--shadow-md);
}

.wechat-qr p { color: var(--gray-500); font-size: 0.875rem; }

/* Contact Form */
.contact-form-wrapper {
  background: var(--white);
  padding: 48px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
}

.contact-form-wrapper h2 { margin-bottom: 8px; }
.form-desc {
  color: var(--gray-500);
  margin-bottom: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--dark);
  font-size: 0.9375rem;
}

.required { color: #ef4444; }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  color: var(--dark);
  background: var(--gray-100);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-group textarea { resize: vertical; min-height: 140px; }

/* Service Promise */
.service-promise {
  padding: 80px 0;
  background: var(--gray-100);
}

.service-promise h2 { text-align: center; margin-bottom: 48px; }

.promise-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.promise-item {
  background: var(--white);
  padding: 28px 16px;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.promise-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.promise-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.promise-item h4 {
  font-size: 0.9375rem;
  margin-bottom: 6px;
}

.promise-item p {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* Map */
.map-section { padding: 80px 0; }
.map-section h2 { text-align: center; margin-bottom: 40px; }

.map-placeholder {
  background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
  border-radius: var(--radius-xl);
  padding: 60px;
  text-align: center;
}

.map-content {
  padding: 40px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: inline-block;
}

.map-content p { font-size: 1.125rem; color: var(--dark); margin-bottom: 8px; }
.map-hint { color: var(--gray-500); font-size: 0.9375rem !important; }

/* FAQ Preview */
.faq-preview { padding: 80px 0; }
.faq-preview h2 { text-align: center; margin-bottom: 48px; }

.faq-list { max-width: 800px; margin: 0 auto; }
.faq-preview .faq-item { background: var(--white); }

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo .logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.footer-logo .logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
}

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 24px;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-links a {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

.footer-links h4,
.footer-contact h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 24px;
}

.footer-links ul li { margin-bottom: 12px; }
.footer-links a {
  font-size: 0.9375rem;
  opacity: 0.7;
}

.footer-links a:hover {
  opacity: 1;
  color: var(--white);
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  margin-bottom: 14px;
}

/* 底部二维码样式 - 新布局 */
.footer-qrcodes {
  margin-top: 16px;
  width: 240px;
}

.footer-qr-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  width: 100%;
}

.footer-qr-item {
  width: 115px;
}

.footer-wechat-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-wechat-icons {
  display: flex;
  gap: 2px;
}

.footer-wechat-icons span {
  font-size: 1rem;
}

.footer-wechat-text {
  font-size: 0.875rem;
  color: var(--gray-500);
  font-weight: 500;
}

.footer-wechat-btn {
  display: flex;
  align-items: center;
  background: #07c160;
  color: white;
  border-radius: 20px;
  padding: 6px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.footer-wechat-btn svg {
  width: 12px;
  height: 12px;
  margin-right: 4px;
}

/* Logo图片样式 */
.logo-img {
  height: 48px;
  width: auto;
}

/* 合作伙伴区域 */
.partners {
  padding: 80px 0;
  background: var(--gray-100);
}

.partners .section-header {
  margin-bottom: 40px;
}

.partners-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
}

.partner-item {
  padding: 24px 40px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.partner-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.partner-item img {
  height: 60px;
  width: auto;
  object-fit: contain;
  transition: var(--transition);
}

.partner-item:hover img {
  transform: scale(1.05);
}

/* 底部合作伙伴 */
.footer-partners {
  margin-top: 8px;
}

.footer-partners h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-partner-logos {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-partner-logos img {
  height: 28px;
  width: auto;
  transition: var(--transition);
}

.footer-partner-logos img:hover {
  transform: scale(1.1);
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 0.875rem;
}

.footer-bottom a {
  opacity: 0.7;
}
.footer-bottom a:hover { opacity: 1; color: var(--white); }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1200px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .promise-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
  .product-detail-grid { grid-template-columns: 1fr; }
  .product-gallery { position: relative; top: 0; }
  .about-intro-grid { grid-template-columns: 1fr; }
  .about-intro-image { order: -1; }
  .contact-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 20px; }
  .timeline-year { width: 100%; text-align: left; padding: 0 0 0 50px !important; }
  .timeline-content { width: 100%; padding: 0 0 0 50px !important; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-menu-btn { display: flex; align-items: center; justify-content: center; }
  .header .container { height: 64px; }
  
  .hero-content h1 { font-size: 2rem; }
  .hero-content p { font-size: 1rem; }
  
  .features-grid,
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .values-grid,
  .certs-grid,
  .team-grid { grid-template-columns: 1fr; }
  .promise-grid { grid-template-columns: repeat(2, 1fr); }
  
  .form-row { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
  .contact-form-wrapper { padding: 32px 24px; }
  
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  
  .cta-buttons { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .features-grid,
  .products-grid { grid-template-columns: 1fr; }
  .product-actions { flex-direction: column; }
  .product-features { flex-direction: column; gap: 12px; }
  .tabs-header { flex-direction: column; border-bottom: none; }
  .tab-btn { border: none; border-bottom: 2px solid var(--gray-200); }
  .promise-grid { grid-template-columns: 1fr; }
}